What is Rolling Sphere Method of Lightning Protection? Design & Calculations Explained | IEC 62305

Our team has Simplified the Explanation of Rolling Sphere Method for Lightning Protection, one of the most reliable lightning protection design methods. In this video, we'll simplify the complexities and walk you through its important aspects such as its radius, outer zones, and crucial calculations for air termination and penetration depth.
Firstly, we'll understand why such methods are required. The Rolling Sphere Method, Protection Angle method, and the Mesh method are three routes to design lightning protection systems as per IEC 62305, the international standard. These provide guidance for optimal placement of essential equipment such as lightning arresters, down conductors, and earth electrodes.
We will then delve into the Rolling Sphere Method for Lightning Protection, an efficient simplification of more complex designs. It plays a critical role in identifying unprotected areas of a building or structure, ensuring comprehensive coverage.
Next, we'll analyze the radius and outer zones of the Rolling Sphere, highlighting how the radius varies for different classes of Lightning Protection. We will also discuss how side strikes can occur on taller buildings and how we can mitigate these risks.
The video will then explore Lightning Protection Zones as defined by IEC 62305 Part 4, including LPZ 0A and LPZ 0B, providing insight into the direct and indirect lightning threats faced by internal systems.
Towards the end, we will explain the air termination calculations for the Rolling Sphere Method, focusing on the separation distance between air termination rods. Additionally, we'll tackle the crucial factor of penetration depth, which determines the maximum height of objects between air terminals, thus affecting the risk of lightning strikes.
Our simplified approach aims to help you better understand the Rolling Sphere Method and its significance in lightning protection. Remember to check our blog for a more detailed explanation of Lightning Protection Zones - axis-india.com/lightning-prot...
Visit us at axis-india.com/ | Follow us on LinkedIn at bit.ly/AxisIndiaLinkedIn
Axis is a leading manufacturer and supplier of Electrical Components to over 80+ Countries. To get a quote or to talk to our industry expert write to us at [e-mail].
#RollingSphereMethod #LightningProtection #ElectricalSafety
0:00 Introduction
1:05 What is Rolling Sphere Method?
1:46 Radius & Outer Zones of Protection
2:10 Lightning Side Strikes
2:53 Zones of Protection
4:03 Separation Distance Calculation of Air Termination Rods
4:27 Formula - Penetration Distance of a Rolling Sphere

[@mpendulovuyodlamini1307]

This was very useful, thank you for the content.

[@AxisElectrical]

Thanks Mpendulo!

[@fabioflamigni9850]

Great explanation! Thanks

[@AxisElectrical]

Glad you liked it Fabio!

[@nandkumarhendre1262]

Supported well with all details
For lighting arrestor

[@AxisElectrical]

Thanks! We try to improve with every video

[@sheetalsathe8172]

very well explained

[@AxisElectrical]

Thank you Sheetal, glad you liked it!

[@santhoshkumar-lk1vn]

Pls explain about conventional type lightning protection system

[@AxisElectrical]

Hi Santosh,
Here's a video comparing Conventional Type Lightning Protection and ESE Type.
czcams.com/video/fbO-TAqB6X0/video.htmlsi=wCTHqyxCxwPnV5Ym

[@albertogenta7677]

I have found your video very good and I will keep it as a reference. However, I have noted the following: at 1:01 you show a down conductor bolted to the wall. What is the voltage at that point when lightning strikes? Is it safe for the wall or any other component behind the wall? It may arc to other conductive surfaces behind the wall. How about a human being touching with the hand there while lightning strikes?

[@AxisElectrical]

Hey Alberto,
When lightning strikes, the voltage at the point where the down conductor is bolted to the wall can become extremely high. However, the wall itself typically remains safe due to the down conductor’s role in directing the lightning current safely to the ground. This is assuming the lightning protection system is properly installed and grounded.
The potential issue arises if there are any conductive materials like rebars, electrical cables, or electronic devices behind or near the wall. These materials are at risk of experiencing a 'flashover' - an electrical arc caused by high voltage, which can lead to structural damage such as cracks in the wall or harm to electrical components nearby.
In larger buildings with multiple down conductors, the risk of such events is mitigated. The reason is that the lightning current gets divided among multiple conductors, reducing the load and likelihood of flashover on any single conductor.
Touching the down conductor during a lightning strike is highly inadvisable. It exposes a person to 'touch potential,' a dangerous condition where the human body can conduct electricity, posing serious hazards.
It's important to note that lightning protection systems should always be installed by qualified professionals to ensure the highest level of safety and efficacy. Connect with our experts at [e-mail] for a detailed chat.

[@annkitvj]

Hi...do you have any arrange to fix lightning arrestor on terrace where we can't do grouting/hole/drilling in slab.

[@annkitvj]

Is there any thumb rule for identify suitable class of Lightening protection for a building

[@AxisElectrical]

Hi@@annkitvj,
We will help you in fixing your lightning arresters and identifying the suitable class.
Please share your contact details or share your detailed requirement at [e-mail]

[@mohammadnurulislam6878]

Please explain LPS class -1 connection v class-2 connection.

[@AxisElectrical]

Thank you for your suggestion Mohammad,
we will make a detailed video for the same.

[@Vys_k]

Approx how much will cost for a normal house

[@AxisElectrical]

Hey Vysakh,
Let's discuss the costing in detail. Share your house details at [e-mail]